/**
 * Object PHP_Serializer
 *     JavaScript to PHP serialize / unserialize class.
 * This class converts php variables to javascript and vice versa.
 *
 * PARSABLE JAVASCRIPT < === > PHP VARIABLES:
 *    [ JAVASCRIPT TYPE ]        [ PHP TYPE ]
 *    Array        < === >     array
 *    Object        < === >     class (*)
 *    String        < === >     string
 *    Boolean        < === >     boolean
 *    null        < === >     null
 *    Number        < === >     int or double
 *    Date        < === >     class
 *    Error        < === >     class
 *    Function    < === >     class (*)
 *
 * (*) NOTE:
 * Any PHP serialized class requires the native PHP class to be used, then it's not a
 * PHP => JavaScript converter, it's just a usefull serilizer class for each
 * compatible JS and PHP variable types.
 * Lambda, Resources or other dedicated PHP variables are not usefull for JavaScript.
 * There are same restrictions for javascript functions*** too then these will not be sent.
 *
 * *** function test(); alert(php.serialize(test)); will be empty string but
 * *** mytest = new test(); will be sent as test class to php
 * _____________________________________________
 *
 * EXAMPLE:
 *    var php = new PHP_Serializer(); // use new PHP_Serializer(true); to enable UTF8 compatibility
 *    alert(php.unserialize(php.serialize(somevar)));
 *    // should alert the original value of somevar
 * ---------------------------------------------
 * @author              Andrea Giammarchi
 * @site        www.devpro.it
 * @date                2005/11/26
 * @lastmod             2006/05/15 19:00 [modified stringBytes method and removed replace for UTF8 and \r\n]
 *             [add UTF8 var again, PHP strings if are not encoded with utf8_encode aren't compatible with this object]
 *            [Partially rewrote for a better stability and compatibility with Safari or KDE based browsers]
 *            [UTF-8 now has a native support, strings are converted automatically with ISO or UTF-8 charset]
 *
 * @specialthanks    Fabio Sutto, Kentaromiura, Kroc Camen, Cecile Maigrot, John C.Scott, Matteo Galli
 *
 * @version             2.2, tested on FF 1.0, 1.5, IE 5, 5.5, 6, 7 beta 2, Opera 8.5, Konqueror 3.5, Safari 2.0.3
 */
function PHP_Serializer(UTF8) {

    /** public methods */
    function serialize(v) {
        // returns serialized var
        var    s;
        switch(v) {
            case null:
                s = "N;";
                break;
            default:
                s = this[this.__sc2s(v)] ? this[this.__sc2s(v)](v) : this[this.__sc2s(__o)](v);
                break;
        };
        return s;
    };

    function unserialize(s) {
        // returns unserialized var from a php serialized string
        __c = 0;
        __s = s;
        return this[__s.substr(__c, 1)]();
    };

    function stringBytes(s) {
        // returns the php lenght of a string (chars, not bytes)
        return s.length;
    };

    function stringBytesUTF8(s) {
        // returns the php lenght of a string (bytes, not chars)
        var     c, b = 0,
            l = s.length;
        while(l) {
            c = s.charCodeAt(--l);
            b += (c < 128) ? 1 : ((c < 2048) ? 2 : ((c < 65536) ? 3 : 4));
        };
        return b;
    };

    /** private methods */
    function __sc2s(v) {
        return v.constructor.toString();
    };

    function __sc2sKonqueror(v) {
        var    f;
        switch(typeof(v)) {
            case ("string" || v instanceof String):
                f = "__sString";
                break;
            case ("number" || v instanceof Number):
                f = "__sNumber";
                break;
            case ("boolean" || v instanceof Boolean):
                f = "__sBoolean";
                break;
            case ("function" || v instanceof Function):
                f = "__sFunction";
                break;
            default:
                f = (v instanceof Array) ? "__sArray" : "__sObject";
                break;
        };
        return f;
    };

    function __sNConstructor(c) {
        return (c === "[function]" || c === "(Internal Function)");
    };

    function __sCommonAO(v) {
        var    b, n,
            a = 0,
            s = [];
        for(b in v) {
            n = v[b] == null;
            if(n || v[b].constructor != Function) {
                s[a] = [
                    (!isNaN(b) && parseInt(b).toString() === b ? this.__sNumber(b) : this.__sString(b)),
                    (n ? "N;" : this[this.__sc2s(v[b])] ? this[this.__sc2s(v[b])](v[b]) : this[this.__sc2s(__o)](v[b]))
                ].join("");
                ++a;
            };
        };
        return [a, s.join("")];
    };

    function __sBoolean(v) {
        return ["b:", (v ? "1" : "0"), ";"].join("");
    };

    function __sNumber(v) {
        var     s = v.toString();
        return (s.indexOf(".") < 0 ? ["i:", s, ";"] : ["d:", s, ";"]).join("");
    };

    function __sString(v) {
        return ["s:", v.length, ":\"", v, "\";"].join("");
    };

    function __sStringUTF8(v) {
        return ["s:", this.stringBytes(v), ":\"", v, "\";"].join("");
    };

    function __sArray(v) {
        var     s = this.__sCommonAO(v);
        return ["a:", s[0], ":{", s[1], "}"].join("");
    };

    function __sObject(v) {
        var     o = this.__sc2s(v),
            n = o.substr(__n, (o.indexOf("(") - __n)),
            s = this.__sCommonAO(v);
        return ["O:", this.stringBytes(n), ":\"", n, "\":", s[0], ":{", s[1], "}"].join("");
    };

    function __sObjectIE7(v) {
        var     o = this.__sc2s(v),
            n = o.substr(__n, (o.indexOf("(") - __n)),
            s = this.__sCommonAO(v);
        if(n.charAt(0) === " ")
            n = n.substring(1);
        return ["O:", this.stringBytes(n), ":\"", n, "\":", s[0], ":{", s[1], "}"].join("");
    };

    function __sObjectKonqueror(v) {
        var    o = v.constructor.toString(),
            n = this.__sNConstructor(o) ? "Object" : o.substr(__n, (o.indexOf("(") - __n)),
            s = this.__sCommonAO(v);
        return ["O:", this.stringBytes(n), ":\"", n, "\":", s[0], ":{", s[1], "}"].join("");
    };

    function __sFunction(v) {
        return "";
    };

    function __uCommonAO(tmp) {
        var    a, k;
        ++__c;
        a = __s.indexOf(":", ++__c);
        k = parseInt(__s.substr(__c, (a - __c))) + 1;
        __c = a + 2;
        while(--k)
            tmp[this[__s.substr(__c, 1)]()] = this[__s.substr(__c, 1)]();
        return tmp;
    };

    function __uBoolean() {
        var    b = __s.substr((__c + 2), 1) === "1" ? true : false;
        __c += 4;
        return b;
    };

    function __uNumber() {
        var    sli = __s.indexOf(";", (__c + 1)) - 2,
            n = Number(__s.substr((__c + 2), (sli - __c)));
        __c = sli + 3;
        return n;
    };

    function __uStringUTF8() {
        var     c, sls, sli, vls,
            pos = 0;
        __c += 2;
        sls = __s.substr(__c, (__s.indexOf(":", __c) - __c));
        sli = parseInt(sls);
        vls = sls = __c + sls.length + 2;
        while(sli) {
            c = __s.charCodeAt(vls);
            pos += (c < 128) ? 1 : ((c < 2048) ? 2 : ((c < 65536) ? 3 : 4));
            ++vls;
            if(pos === sli)
                sli = 0;
        };
        pos = (vls - sls);
        __c = sls + pos + 2;
        return __s.substr(sls, pos);
    };

    function __uString() {
        var     sls, sli;
        __c += 2;
        sls = __s.substr(__c, (__s.indexOf(":", __c) - __c));
        sli = parseInt(sls);
        sls = __c + sls.length + 2;
        __c = sls + sli + 2;
        return __s.substr(sls, sli);
    };

    function __uArray() {
        var    a = this.__uCommonAO([]);
        ++__c;
        return a;
    };

    function __uObject() {
        var     tmp = ["s", __s.substr(++__c, (__s.indexOf(":", (__c + 3)) - __c))].join(""),
            a = tmp.indexOf("\""),
            l = tmp.length - 2,
            o = tmp.substr((a + 1), (l - a));
        if(eval(["typeof(", o, ") === 'undefined'"].join("")))
            eval(["function ", o, "(){};"].join(""));
        __c += l;
        eval(["tmp = this.__uCommonAO(new ", o, "());"].join(""));
        ++__c;
        return tmp;
    };

    function __uNull() {
        __c += 2;
        return null;
    };

    function __constructorCutLength() {
        function ie7bugCheck(){};
        var    o1 = new ie7bugCheck(),
            o2 = new Object(),
            c1 = __sc2s(o1),
            c2 = __sc2s(o2);
        if(c1.charAt(0) !== c2.charAt(0))
            __ie7 = true;
        return (__ie7 || c2.indexOf("(") !== 16) ? 9 : 10;
    };

    /** private variables */
    var     __c = 0,
        __ie7 = false,
        __b = __sNConstructor(__c.constructor.toString()),
        __n = __b ? 9 : __constructorCutLength(),
        __s = "",
        __a = [],
        __o = {},
        __f = function(){};

    /** public prototypes */
    PHP_Serializer.prototype.serialize = serialize;
    PHP_Serializer.prototype.unserialize = unserialize;
    PHP_Serializer.prototype.stringBytes = UTF8 ? stringBytesUTF8 : stringBytes;

    /** serialize: private prototypes */
    if(__b) { // Konqueror / Safari prototypes
        PHP_Serializer.prototype.__sc2s = __sc2sKonqueror;
        PHP_Serializer.prototype.__sNConstructor = __sNConstructor;
        PHP_Serializer.prototype.__sCommonAO = __sCommonAO;
        PHP_Serializer.prototype[__sc2sKonqueror(__b)] = __sBoolean;
        PHP_Serializer.prototype.__sNumber =
        PHP_Serializer.prototype[__sc2sKonqueror(__n)] = __sNumber;
        PHP_Serializer.prototype.__sString = PHP_Serializer.prototype[__sc2sKonqueror(__s)] = UTF8 ? __sStringUTF8 : __sString;
        PHP_Serializer.prototype[__sc2sKonqueror(__a)] = __sArray;
        PHP_Serializer.prototype[__sc2sKonqueror(__o)] = __sObjectKonqueror;
        PHP_Serializer.prototype[__sc2sKonqueror(__f)] = __sFunction;
    }
    else { // FireFox, IE, Opera prototypes
        PHP_Serializer.prototype.__sc2s = __sc2s;
        PHP_Serializer.prototype.__sCommonAO = __sCommonAO;
        PHP_Serializer.prototype[__sc2s(__b)] = __sBoolean;
        PHP_Serializer.prototype.__sNumber =
        PHP_Serializer.prototype[__sc2s(__n)] = __sNumber;
        PHP_Serializer.prototype.__sString = PHP_Serializer.prototype[__sc2s(__s)] = UTF8 ? __sStringUTF8 : __sString;
        PHP_Serializer.prototype[__sc2s(__a)] = __sArray;
        PHP_Serializer.prototype[__sc2s(__o)] = __ie7 ? __sObjectIE7 : __sObject;
        PHP_Serializer.prototype[__sc2s(__f)] = __sFunction;
    };

    /** unserialize: private prototypes */
    PHP_Serializer.prototype.__uCommonAO = __uCommonAO;
    PHP_Serializer.prototype.b = __uBoolean;
    PHP_Serializer.prototype.i =
    PHP_Serializer.prototype.d = __uNumber;
    PHP_Serializer.prototype.s = UTF8 ? __uStringUTF8 : __uString;
    PHP_Serializer.prototype.a = __uArray;
    PHP_Serializer.prototype.O = __uObject;
    PHP_Serializer.prototype.N = __uNull;
};